9514 1404 393
Answer:
(b) 82
Explanation:
The Pythagorean theorem tells you the length of MP is ...
MP = √(CM² -CP²)
MP = √(67² -53²) = √1680 ≈ 40.988
The length of MN is twice this, so is ...
MN = 2×MP = 2×40.988 = 81.976
Rounded to the nearest tenth, ...
MN ≈ 82.0